I'm working on a project that (ideally) would have a 3" x 6" monochrome OLED display. And in a perfect world, it would also have a touchscreen, but let's put that aside for a moment...

Since this display doesn't exist, it seems like the best alternative is to use multiple OLED screens (SSD1306 like http://www.adafruit.com/blog/2011/01/06 ... ic-display), or multiple TFT screens (2.8" like http://www.adafruit.com/products/376). Is it possible to control multiple OLED or TFT screens from one Arduino? I'm familiar with the I2C bus, where multiple devices can chain together, each with their own adderess... But I don't know if/how this might work with SPI and the higher data demands of these screens.

So is this feasible with an Arduino type microcontroller? Or should I give up on that approach, and think about a Radpberry Pi driving a 7" touchscreen, or something like that?

unfortunately as to 3"x6" OLED - no such thing exists. the ones we have are very very small, its not really possible to drive that many mini OLED displays and they wont line up :/ there is a future beaglebone 7" TFT display but its not out yet and there's no ETA. the biggest display we stock is the 2.8" but you can only drive one at a time from an Arduino.

But I think that the 32x32 RGB LED Matrix might be able to do the job. 5"x5" is a nice size. Now, the wish list is for a 5"x5" touchscreen to slap on the front. They don't seem to exist in that size though, so I'll have to think about alternatives.

Hello, I like the topic of the post, I have the same problem too, I would like to have three oled display in my project, connected to a single Arduino. With less cable as possible. So 3 wire to connect al my displays in chain would be ok. Could you help me to choose the right product or the right lcd backpack to chain displays ? I already read that i can buy the 128*64 display and declare multiples displays, that sounds good !